Compound base for motion picture projection machines



Nov. 10, 1931. A. DINA 1,831,346

COMPOUND BASE FOR MOTION PICTURE PROJECTION MACHINES O Filed Nov. 30. 1928 4 Sheets-Sheet l 33% 41:1 Glbtomut r A. DINA Nov. 10, 1931.

COMPOUND BASE FOR MOTION PICTURE PROJECTION MACHINES Filed Nov. 30. 928 4 Sheets-Sheet 2 v avwwbo'c Hugus/o 3/270 Nov. 10, 1931. A. DINA 1,831,346

COMPOUND BASE FOR MOTION, PICTURE PROJECTION MACHINES Filed Nov. 30.- 1928 4 Sheets-Sheet 3 Quoentoz Nov. 10, 1931. A. DINA 1,831,346

COMPOUND BASE FOR MOTION PICTURE PROJECTION MACHINES Filed NOV- 30. 1928 4 Sheets-Sheet 4 N \F N x F W avwemto'c 62/92/5/0 9/)70 $5 $2 Guam;

Patented Nov. 10, 1931 UNITED STATES PATENT OFFICE AUGUSTO DINA, OF JERSEY CITY, NEW JERSEY, ASSIGNOR TO INTERNATIONAL PROJECTOR CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE COMYOUND BASE FOR MOTION PICTURE PROJECTION MACHINES Application filed November so, 1928. Serial No. 322,697.

This invention relatesto projection machines, and more particularly to a new and improved base therefor.

Projection machines are commonly so constructed as to permit the line of projection to be varied within certain limits for properly directing the picture upon a distant screen. It sometimes happens however, that due to the construction of a particular theatre, an unusually sharp angle of declination is necessary. This condition might occur, for example, in case the theatre were of unusual height or the horizontal distance between the projection machine and the screen wereshort compared to the elevation of the projection machine.

It is therefore an object of the present in vention to provide adjustable means for permitting the line of projection to be varied beyond the normal angular deviation of the machine.

Another object is to provide a strong and rigid base which is capable of preventing undesired vibrations of the machine.

The invention also consists in certain new and original features of construction and combinations of parts hereinafter set forth and claimed.

Although the novel features which are believed to be characteristic of this invention will be particularly pointed out in the claims appended hereto, the invention itself, as to its objects and advantages, the mode of its operation and the manner of itsorganization may be better understood by referring to the following description taken in connection with the accompanying drawings forming a part thereof, in which,

Fig. 1 is a side elevation of a projection machine showing the adjustable base;

Fig. 2 is a plan view of the base;

Fig. 3 is a section taken on the line 33 of Fig. 2 and looking in a direction parallel to the base;

Fig. 4 is a plan view of the adjustable sup ort; Y

p Fig. 5 is a section taken along the line 55 of Fig. 2;

Fig. 6 is a section taken along the line 6-6.

of Fig. 2; and

In the following description and in the claims parts. will be identified by specific namesfor convenience, but they are intended to be as generic in their application to similar parts as the art will permit.

Referring to the drawings more in detail,

the invention is shown as applied to a projection machine comprising a pedestal 10 mounted upon a base 11 which will be hereinafter described more in detail. Pedestal lever 12 is pivotally mounted on pedestal 10 and carries lamphouse 13, projection head 14 and film magazines 15. Adjusting screw 16 is provided for adjusting the angle of pedestal lever 12 with respect to pedestal 10 for varying the line of projection of the machine. Rear supporting legs 17 extend between pedestal lever 12 and base 11 and may be adjusted as to height by any desired means. The particular-form of projection machine, however, forms no part of the present invention and will not be described in detail.

Base 11 comprises a body portion 20 having a flange 21 positioned for supporting pedestal 10, flange 22' for supportin a foot switch and an aperture 23 through w ich the electric cable m'av be applied to the machine. Base 11 is provided with a pair of forwardly extending legs 24 (Fi s. 2 and 6) terminating in feet 25 in which %olts 27 ma be threaded for purposes of adjustment. aid legs are also provided with a boss 28, having an aperture through which a bolt may be inserted for securing said leg to the supporting medium, such as the floor of the projection room.

Base 11 is also provided with a rearwardly extending leg 30 and sidewardly extending legs 31 which terminate in feet 32 and 33 respectively. Said feet are provided with suitable apertures in which adjusting bolts 34 may be threaded.

The adjustable base support comprises a member (Fig. 4) which is provided with sidewardly extending legs 42 and a rearwardly extending leg 43 having a contour similar to that of the-rear end of base 11 cuppe including legs 31 and 30 thereof under which they are positioned. Legs 42 and 43 terminate in feet 45 in which bolts 46 are threaded. Said legs are slightly longer than legs 31, and 30 and include cupped surfaces 41 which re ccive bolts 34 of base member 11.

The central portion of base member 11 is provided with threaded holes 47 (Fig. 2) in which bolts 48 are carried, said bolts being of sufiicient length to contact with the supporting surface for assisting bolts 27 and 46 in carr ing the weight of the base. Suitable d members 49 may be positioned under bolts 27 and 46, if desired, for distributing the stress over a larger portion of the supporting floor. The leg 30 of base 11 is preferably provided with a boss 51 having a suitable opening therein to permit the passage of bolt 52 which may be threaded into the supporting member or floor for securing the parts in their proper relationship.

When the line of projection of the projection machine cannot otherwise be adjusted to a sufliciently steep angle. the support is positioned under the rear end of the base and receives bolts 34 by means of which the base is carried. Bolts 27 and 46 are then adjusted in contact with. the floor or supporting cups 49 to bring base 11 to its desired position. Said base may then be clamped to the floor by bolt 52 which is inserted through boss 51 at the rear end of said base and by suitable bolts (not shown) which may be inserted through bosses 28 on legs 24 of the base.

Support is preferably constructed of slightly larger size than the rear end of base 11 in order to render bolts 46 readily accessible. Obviously a plurality of said supportins members could be em loyed if it were desired to project the picture at an excessivelv steep angle. the various feet of each member contact with suitable sockets in the adjacent member. Bv permitting the support to be adjusted with respect to the floor as well as with res ect to the base itself a more flexible control is obtained.

While certain novel features of the invention have been shown and described and are ointed out in the annexed claims. it will be understood that various omissions. substitutions and chances in the forms and details of the device illustrated and in its operation may be made bv those skilled in the art without departing from the spirit of the invention.

What is claimed is:

1. In a projection machine comprising a base, pedestal and picture projection mechanism, saidbase being adapted to normally rest on a floor, means for increasing the angle of projection of said mach ne comprising a support. means for mounting the rear portion of said base on said support. and adjustable means for varying the elevation of said support with respect to the floor whereby the angle of projection of said machine may be varied.

2. In combination with a projection machine, a base having supporting feet, adjusting bolts extending through said feet, a support for certain of said feet, said support having dished surfaces inwhich said bolts are adapted to seat, a plurality of feet formed on said support and adjusting bolts extending therethrough for determining the elevation of said support with respect to the floor.

3. In combination with a projection machine, a base having supporting feet, an adjustable support for certain of said feet, said support comprisin a member having supporting surfaces a apted to engage said feet and means for securing saidsup ort to sai base comprising a bolt extended t rough said base and secured to a supporting member.

4. In combination with a projection machine, a base having front and rear feet, supporting bolts extending through said feet, an adjustable support for said rear feet, said support having surfaces adapted to contact with said supporting bolts and additional supporting bolts extending through said support and adapted to contact with a floor.

5. In combination with a basefor a rojection machine, a support therefor, ad usting bolts extendin through said base and con- .tactin with sald support, and adjusting bolts exten ing through said support and contacting with the floor, said support being of greater extent than the adjacent portion of said base, said last mentioned bolts being positioned external to said base.

AUGUSTO DINA. 

